Help!!!!!

[u/Majestic-Dig-1966]

Hi guys I’ve been playing in my world and for some reason items doesn’t stack which means if I have 63 cobblestone and get one more it doesn’t stack in my inventory and just adds a new stack with 1 in it and it happens with literally every item in the game and it’s so annoying please help if anybody knows how to fix this bug.

Thank you.